Movie adaptation of the Sekaiichi Hatsukoi: Yokozawa Takafumi no Baai BL light novel.

Two OVA episodes featuring additional stories. Episode 0: Ritsu and Takano used to date back in high school, but broke up due to a misunderstanding. This is that story. Episode 12.5: Hatori and Chiaki go to visit the latter's family. It's really awkward in many, many ways.

Even at their colleagues' wedding, the sparkling members of Marukawa Publishing's Emerald Department stand out. Having been invited to assist in providing entertainment for the guests, Masamune Takano, Ritsu Onodera, Yoshiyuki Hatori, Shouta Kisa, Kanade Mino, as well as Takafumi Yokozawa enjoy the festivities as much as their work allows. As love blossoms between two individuals, marriage marks a momentous occasion fit for self-reflection. Whether they like it or not, the men of Marukawa need to consider where their own relationships are headed.

Beautiful sisters Ai, Mai, Mii, their android maid Mea and slippery pet ferret Unagi make an amazing journey together through time and space without ever leaving their beloved mansion behind! Following the clues of the strange dandelion-like "Popotan," the girls are theoretically seeking the person who has the answers to their most personal questions, but they seem to have more than enough time to take side trips, meet new friends, visit hot springs and occasionally operate the X-mas shop they keep in the house along the way! Yet, the girls' ultimate destiny holds more than a few surprises of its own, and not every moment is filled with hilarity, as moving through time means having to leave friends behind as well.